<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .error-container {
            text-align: center;
            background: white;
            padding: 4rem 2rem;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            max-width: 600px;
            width: 100%;
        }

        .error-code {
            font-size: 12rem;
            font-weight: 700;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            line-height: 1;
            margin-bottom: 1rem;
            position: relative;
            animation: float 3s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        .error-message {
            font-size: 1.5rem;
            color: #333;
            margin-bottom: 2rem;
            line-height: 1.5;
        }

        .error-subtext {
            color: #666;
            margin-bottom: 3rem;
            font-size: 1rem;
        }

        .back-home {
            display: inline-block;
            padding: 1rem 2rem;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 500;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
        }

        .back-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
        }

        .search-box {
            margin: 2rem 0;
            display: flex;
            max-width: 400px;
            width: 100%;
            margin-left: auto;
            margin-right: auto;
        }

        .search-box input {
            flex: 1;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 50px 0 0 50px;
            outline: none;
            font-size: 1rem;
        }

        .search-box button {
            padding: 1rem 1.5rem;
            background: #667eea;
            color: white;
            border: none;
            border-radius: 0 50px 50px 0;
            cursor: pointer;
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .error-code {
                font-size: 8rem;
            }
            
            .error-message {
                font-size: 1.2rem;
            }
        }
    </style>
</head>
<body>
    <div class="error-container">
        <div class="error-code">404</div>
        <div class="error-message">哎呀，页面好像迷路了！</div>
        <div class="error-subtext">
            你访问的页面不存在、已被删除或暂时不可用<br>
            请检查网址是否正确，或返回首页继续浏览
        </div>
        
        <div class="search-box">
            <input type="text" placeholder="搜索你想找的内容...">
            <button>搜索</button>
        </div>
        
        <a href="/" class="back-home">返回首页</a>
    </div>
</body>
</html>